# Sarah's Physics 111

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Sarah's Physics 111

## 1. Linear Motion

### 1.1. displacement

1.1.1. difference between point A and point B, no matter the route taken to get between the two.

### 1.2. speed

1.2.1. motion diagrams

1.2.1.1. loggerpro

1.2.1.1.1. videos

1.2.1.1.2. graphs

1.2.1.1.3. temporary hatered equal to the heat of a thousand suns...

1.2.2. s=d/t

1.2.3. similar to velocity, but direction makes no difference. Simply the rate of motion.

### 1.3. velocity

1.3.1. cop v. perp

1.3.1.1. motion graphs

1.3.1.2. position graphs

1.3.1.3. velocity graphs

1.3.1.4. VPython

1.3.1.4.1. SWEET!(but not easy at all...)

1.3.1.4.2. assignment #6 and 7 a total bust!

1.3.2. depends on rate of motion and direction

1.3.2.1. v=d/t

1.3.2.2. in physics, a negitive number usually denotes direction. This is helful with velocity.

### 1.4. newton's laws of motion

1.4.1. 1st law, An object in motion will stay in motion until acted on by an unbalaced force. An object at rest will stay at rest until acted on by an unbalanced force.

1.4.1.1. Imagine we are in space floating but not moving at all. We will not go anywhere until an outside force is exerted on one of us. Motion doesn't spontaneously appear. If I push you, you will begin moving away from me continuously until something stops you. Since we are in space, that isn't likely to happen anytime soon, especially without gravity or friction.

1.4.2. 2nd law, F=MA

1.4.2.1. This law explaines why it takes more force to move an object with greater mass than one with a smaller mass. Acceleration is the force exerted on an object divided by the mass of it. If you exert 10 N of force on an object with 1 kg of mass, it will have an acceleration of 10m/s/s. If you exert the same 10N on an object with 10kg of mass, it only moves with an acceleration of 1m/s/s.

1.4.3. 3rd law, for every action there is an opposite and equal reaction.

1.4.3.1. In our P1 and P2 projects, our launchers used this rule to launch our mallows. While the mallows were in flight, the earth was pulling on them with the same force the mallows were pulling up on the earth. Even though the two objects have a tremendous difference in mass, they are still exerting the same amount of force on each other.

### 1.5. acceleration

1.5.1. F=ma

1.5.2. different from velocity because acceleration is the change in rate or in other words, velocity is going somewhere at a certain rate, acceleration is how fast are you speeding up. You can have velocity without acceleration, but you cant have acceleration without velocity.

1.5.2.1. i.e. If you drive onto a freeway, you will have a velocity because you are traveling in any given direction at a given speed. You will also have acceleration as you press the gas to continuously speed up to 65mph, your rate of speed increases. After you get to 65mph, you put on the cruise control to maintain that. You now have a constant velocity, but no acceleration.

## 2. Outline

### 2.1. Non-linear Motion

2.1.1. 3D motion

2.1.1.1. Launcher problem

2.1.1.1.1. totally got it! pencast made it clear. understanding the relationships between values makes it easy to apply the same rules and principals to a completely different question.

2.1.1.2. x,y,z axis

2.1.1.2.1. must be viewed as 2 or 3 different problems and combined to get motion in all three dimensions.

2.1.2. 2D motion

2.1.2.1. only uses the x and y axis

2.1.2.1.1. during launch, flight and landing of mallows, the two axis can tell you not only how fast and how far the mallow moved along the x axis, but can also tell you how long it will be in the air after taking into concideration gravity's effect on the y axis.

2.1.3. Linear motion

2.1.3.1. x or y axis only

2.1.3.1.1. motion is only scrutinized along one direction. This is often used for the dreaded, "If a train leaves Denver...." velocity problems.

2.1.4. circular motion

2.1.4.1. Fc=m(v^2/r)

2.1.4.1.1. I can use this equation, but I hope next week a pencast will make it seem more logical and natural to use.

2.1.4.2. Ac=v^2/r

2.1.4.2.1. again, I can use it but I dont feel as comfortable with it as I would like. I did however see the relationship between the force and acceleration.

2.1.4.3. maybe I just plain missed it, but how do I find the velocity and the arc??? pencast please!

### 2.2. Forces and Momentum

2.2.1. Types of energy

2.2.1.1. Kinetic

2.2.1.1.1. Kinetic energy is the work required to give an object motion. This is often the result of transformed potential energy.

2.2.1.2. Potential

2.2.1.2.1. potential energy is the energy stored within a system that is able to do work. This is usually transformed into kinetic energy or gravitational energy.

2.2.1.3. Gravitational

2.2.1.3.1. 9.8 m/s/s

2.2.1.3.2. constant energy force that comes from earth's pull on all objects.

## 4. Frustrations!!!...and a few cool things.

### 4.1. so much technology

4.1.1. LoggerPro

4.1.2. mindmeister

4.1.2.1. cool, but I wasnt sure at first what it might help. In the last week or so as the concepts really click, I find my map is much more detailed and I have a much easier time figuring out what to put in it. This week has been much more substance instead of reaction.

4.1.2.2. on the down side, the more complex my map gets, the more problems Im having. It is slow and doesnt always save the last entry...Grrrr.

4.1.3. glogster

4.1.3.1. week 1

4.1.3.2. week 2

4.1.3.3. week 3

4.1.3.4. week 4

4.1.3.5. week 5

4.1.3.6. week 6

4.1.3.7. week 7

4.1.3.8. week 8

4.1.3.9. P1 glog

4.1.3.10. P2 glog

4.1.3.11. P3 glog

4.1.4. animoto

4.1.4.1. Marshmallow Launcher video

4.1.4.2. Intro video

4.1.4.3. love it, I will keep using it.

4.1.5. dipity

4.1.5.1. Ongoing project

4.1.5.2. interesting concept. I can see how it helps to see our work and progress, but I doubt I will continue to use it later.

4.1.6. VPython

4.1.6.1. 1st time using

4.1.6.2. I dont know the first thing about writing code so this was the hardest thing for me. Trying to understand the concepts and translate them to code I think only confused me more. I honestly didnt like it at all.

### 4.2. organization

4.2.1. new accounts

4.2.2. thoughts

4.2.2.1. staying organized is really difficult for this class. since everything is digital and virtual and has to be interconnected I find myself second guessing everything and spending too much time double checking that everything is linked. I wish I had been able to come up with a better system.

4.2.3. time management

4.2.3.1. this was difficult for this class. I also had to take a chemistry class at the same time and combined with work I unfortunately had to do most of the work on the weekends. I hate waiting till the end like that but I didnt really have a choice this time. With that said, considering what I had to work around, I think I did pretty good. I wont take physics and chem at the same time ever again though...

## 5. Projects

### 5.1. Mallow Launcher

5.1.1. team

5.1.1.1. Melissa

5.1.1.1.1. team techie

5.1.1.1.2. writer

5.1.1.2. Norm

5.1.1.2.1. writer

5.1.1.2.2. art director

5.1.1.2.3. number cruncher

5.1.1.3. ME!

5.1.1.3.1. Editor

5.1.1.3.3. writer

5.1.2. plan

5.1.2.1. Everyone builds a launcher, best results is final project.

### 5.2. Mallow Slingshot

5.2.1. Team

5.2.1.1. Sarah Contreras

5.2.1.1.1. My launcher was already a successful slingshot style.

5.2.1.1.2. writer

5.2.1.1.3. editor

5.2.1.2. Johnsua Brindley

5.2.1.2.1. Converted to slingshot

5.2.1.2.2. writer

5.2.1.2.3. editor

5.2.1.3. Joshua Marriott

5.2.1.3.1. Also converted to slingshot style

5.2.1.3.2. writer

5.2.1.3.3. editor

5.2.2. Plan

5.2.2.1. Convert launchers into sling shots

5.2.2.1.1. use most successful for data

5.2.2.2. Rock it like noone's business!

### 5.3. Paintball/ Bullet Motion

5.3.1. The Physics Kids

5.3.2. New Team Name

5.3.2.1. Same team mates

5.3.3. physics of motion

5.3.3.1. velocity

5.3.3.2. acceleration of bullet

5.3.3.3. rotational physics

5.3.3.4. momentum

5.3.3.5. exchange and transformation of energy

5.3.4. Colt .45

5.3.4.1. mass

5.3.4.2. velocity